Look under the car at the front left corner. Just in front of the drivers side front tire. I think that's where it is. good luck.
The recharge valve for the air conditioner on a 2002 GMC Envoy can be found by looking at the rear of the engine compartment. It will have a cap over the valve labelled as low pressure side.
Against the firewall
The 1990 Buick LeSabre air conditioner recharge valve can be found on top of the air conditioning compressor. The air conditioner recharge valve will have a blue top.
passanger side engine compartment might be on accumalator or line
The Freon recharge port can be found on the top of the air conditioner compressor. There will be two ports. The recharge port will be labeled as the low pressure port.
The air conditioner on a 2004 Saturn Vue is recharged by locating the low pressure valve and connecting the refrigerant supply. It is then injected into the system until the desired pressure is reached.
It's about 5" downstream of the pipe coming off the compressor. Access from under side of car.
The low pressure port in on the hose coming off of the compressor. It is just under the radiator support on the passenger side.
Its on top of the a/c accumulator.................
the recharge valve is the smaller valve on the low pressure side (line). it is located above the dryer and next to the low pressure switch.the valve is on the line right next to the firewall on the passanger side.
Its on the a/c accumulator..............
on my 89 it's at the top of the large silver cansister part on the left as you're looking at it from the front of the vehicle, the high pressure valve is lower on the tubing and looks very similar to a tire valve. Both valves would have plastic screw caps on them